1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org> 5 * 6 * This software was developed by SRI International and the University of 7 * Cambridge Computer Laboratory (Department of Computer Science and 8 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the 9 * DARPA SSITH research programme. 10 * 11 * This software was developed by SRI International and the University of 12 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 13 * ("CTSRD"), as part of the DARPA CRASH research programme. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $FreeBSD$ 37 */ 38 #pragma once 39 40 41 /* <bits/fcntl.h> includes <bits/stat.h> which contains a member __unused */ 42 #include "__unused_workaround_start.h" 43 #include_next <fcntl.h> 44 #include "__unused_workaround_end.h" 45 46 #ifdef __unused_undefd 47 #undef __unused_undefd 48 #define __unused __attribute__((unused)) 49 #endif 50 51 #include <sys/file.h> 52 53 #ifndef O_EXLOCK 54 #define O_EXLOCK (1 << 30) 55 #endif 56 #ifndef O_SHLOCK 57 #define O_SHLOCK (1 << 31) 58 #endif 59 60 #undef open 61 #define open(path, flags, ...) ({ \ 62 int __fd = (open)(path, flags, ##__VA_ARGS__); \ 63 if (flags & O_EXLOCK) flock(__fd, LOCK_EX); \ 64 if (flags & O_SHLOCK) flock(__fd, LOCK_SH); \ 65 __fd; }) 66